Crystallization mechanism of glass-ceramics prepared from stainless steel slag

作     者：Wen-Di Fan Qiang-Wei Yang Bin Guo Bo Liu Shen-Gen Zhang 

作者机构：Institute for Advanced Materials and Technology University of Science and Technology Beijing 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2018年第37卷第5期

页      面：413-420页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. U1360202, 51472030,51672024 and 51502014) Fundamental Research Funds for the Central Universities (No. FRF-TP-16-027A3) Innovation Project of Yunnan Province New Material Preparation and Processing Key Laboratory (No. 2016cx05) 

主　　题：Glass-ceramics Stainless steel slag Augite 

摘      要：Glass-ceramics have been prepared by using stainless steel slag, fly ash and coal fly ash that were figobtained from industrial solid waste. The crystallization behavior and mechanical characterization of the glass-ce-ramics with different （CaO ＋ MgO）/（SiO2 ＋ Al2O3） content ratios were studied. While the basicity decreases from 1.2 to 0.9 cm^-3, the bridge oxygen content increases from 1.18 ~ 10^21 to 1.34 ~ 10^21 cm^-3. According to the deconvolution of Raman spectra, the relative abundance of the stretching of Si-Onb bond （Q^n units） can be obtained. The increase in the Q^3 units dominates the polymerization in the process of decreasing basicity. This change in bonding is demonstrated to lead to polymerization of the glass network and the increase in crystallization activation energy from 336.0 to 360.7 kJ·mol^-l. The results demonstrate that the production of the glass-ceramics from industrial steel slag, fly ash and coal fly ash is cost-effective and offers advantages over other production methods.